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Hallo,
since kernel 5.3 i have occasional swapped harddisk device names (/dev/sda <> /dev/sdb). The first one is GPT/EFI with 9 partitions. The other one is MBR with 2 partitions. When they are swapped the boot process ends in a recovery environment/shell. What can i do to make the mapping static? There already is a root=<UUID> entry in GRUB.
Any ideas?
grub.cfg:
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
insmod part_gpt
insmod part_msdos
if [ -s $prefix/grubenv ]; then
load_env
fi
if [ "${next_entry}" ] ; then
set default="${next_entry}"
set next_entry=
save_env next_entry
set boot_once=true
else
set default="${saved_entry}"
fi
if [ x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option="--id"
else
menuentry_id_option=""
fi
export menuentry_id_option
if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
}
function load_video {
if [ x$feature_all_video_module = xy ]; then
insmod all_video
else
insmod efi_gop
insmod efi_uga
insmod ieee1275_fb
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
fi
}
if [ x$feature_default_font_path = xy ] ; then
font=unicode
else
insmod part_gpt
insmod ext2
set root='hd0,gpt6'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1275//disk@0,gpt6' --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6 11111111-1111-1111-1111-111111111111
else
search --no-floppy --fs-uuid --set=root 11111111-1111-1111-1111-111111111111
fi
font="/usr/share/grub/unicode.pf2"
fi
if loadfont $font ; then
set gfxmode=800x600x32,auto
load_video
insmod gfxterm
set locale_dir=$prefix/locale
set lang=de_DE
insmod gettext
fi
terminal_input console
terminal_output gfxterm
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=menu
set timeout=2
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
set timeout=2
fi
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/10_linux ###
menuentry 'Arch Linux' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-11111111-1111-1111-1111-111111111111' {
savedefault
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
set root='hd0,gpt6'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1275//disk@0,gpt6' --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6 11111111-1111-1111-1111-111111111111
else
search --no-floppy --fs-uuid --set=root 11111111-1111-1111-1111-111111111111
fi
echo 'Loading Linux linux ...'
linux /boot/vmlinuz-linux root=UUID=11111111-1111-1111-1111-111111111111 rw threadirqs
echo 'Loading initial ramdisk ...'
initrd /boot/intel-ucode.img /boot/initramfs-linux.img
}
submenu 'Advanced options for Arch Linux' $menuentry_id_option 'gnulinux-advanced-11111111-1111-1111-1111-111111111111' {
menuentry 'Arch Linux, with Linux linux' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-advanced-11111111-1111-1111-1111-111111111111' {
savedefault
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
set root='hd0,gpt6'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1275//disk@0,gpt6' --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6 11111111-1111-1111-1111-111111111111
else
search --no-floppy --fs-uuid --set=root 11111111-1111-1111-1111-111111111111
fi
echo 'Loading Linux linux ...'
linux /boot/vmlinuz-linux root=UUID=11111111-1111-1111-1111-111111111111 rw threadirqs
echo 'Loading initial ramdisk ...'
initrd /boot/intel-ucode.img /boot/initramfs-linux.img
}
menuentry 'Arch Linux, with Linux linux (fallback initramfs)' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-fallback-11111111-1111-1111-1111-111111111111' {
savedefault
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
set root='hd0,gpt6'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1275//disk@0,gpt6' --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6 11111111-1111-1111-1111-111111111111
else
search --no-floppy --fs-uuid --set=root 11111111-1111-1111-1111-111111111111
fi
echo 'Loading Linux linux ...'
linux /boot/vmlinuz-linux root=UUID=11111111-1111-1111-1111-111111111111 rw threadirqs
echo 'Loading initial ramdisk ...'
initrd /boot/initramfs-linux-fallback.img
}
}
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###
### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###
### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
# BEGIN Copied from /etc/grub.d/30_os-prober ###
# END Copied from /etc/grub.d/30_os-prober ###
### END /etc/grub.d/40_custom ###
### BEGIN /etc/grub.d/41_custom ###
if [ -f ${config_directory}/custom.cfg ]; then
source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
fstab:
# /dev/sda6
UUID=11111111-1111-1111-1111-111111111111 / ext4 rw,relatime,data=ordered,commit=30 0 1
# /dev/sda11
UUID=22222222-2222-2222-2222-222222222222 /media/LinuxPart2 ext4 rw,relatime,data=ordered,commit=30 0 1
# /dev/sda5
UUID=33333333-3333-3333-3333-333333333333 /media/LinuxPart3 ext4 rw,relatime,data=ordered,commit=30 0 1
# NTFS-3G
/dev/sda3 /media/Volume-C ntfs-3g rw,nosuid,nodev,relatime,uid=1000,gid=1000,fmask=111,dmask=000,uhelper=udisks2,noauto
/dev/sda4 /media/Volume-D ntfs-3g rw,nosuid,nodev,relatime,uid=1000,gid=1000,fmask=111,dmask=000,uhelper=udisks2,noauto
/dev/sda8 /media/Volume-F ntfs-3g rw,nosuid,nodev,relatime,uid=1000,gid=1000,fmask=111,dmask=000,uhelper=udisks2
/dev/sda9 /media/Volume-G ntfs-3g rw,nosuid,nodev,relatime,uid=1000,gid=1000,fmask=111,dmask=000,uhelper=udisks2
Last edited by Maniaxx (2019-10-02 17:09:44)
sys2064
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Pretty normal. That's why you shouldn't be using /dev/sda in fstab, you already have some using the UUID, why not all?
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Didn't know Linux derives one from serial number for NTFS.
Will try that. Thanks.
Edit:
On a 2nd thought...
Wouldn't that still allow sda<>sdb to be swapped? I have more tools like Veracrypt that rely on proper sda/sdb mapping. Its not just the boot process. Would a grub 'device.map' help here or a udev rule? What exactly is responsible for the "BIOS to sdx" mapping (systemd, udev, grub, kernel...)?
Last edited by Maniaxx (2019-10-02 16:26:37)
sys2064
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https://bugs.archlinux.org/task/63984 any change would need to come from upstream. can-veracrypt-use-persistent-mount-points-on-linux.
Edit:
The sda/sdb assignment is done by the kernel, the persistent identifiers by udev.
Last edited by loqs (2019-10-02 16:34:05)
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sda/sdb assignments are somewhat random. Don't use them in configs, end of story
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Thanks. Will try to make the best out of it.
Loqs references are exactly what i experience here.
sys2064
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